Discussions By Condition: I cannot get a diagnosis.

Swollen tongue, last Oct., and downhill from there

Last October, I developed an uncomfortably swollen tongue - no answers from dentist. No answers from internist. Lots of tests run. No help from ENT - finally convinced to give 7-day prednisone. On day 7, right side reduced in size to almost normal, left reduced some. In the meantime, I am extremely exhausted and fatigued. It was hard to do any thing. Results of internist's tests show sudden appearance of diabetes, high creatinine - other tests okay. Take long glucose test - def. have diabetes now. Nephrologist finds 50% kidney damage. Tells me not to take Metformin prescribed by Internist - "may not be right Rx for me." Kidney ultrasound only shows a small cyst on kidney - no big deal. Blood tests a month later show improvement. Ask re: diabetes rx and nephrologist says to talk to Internist!!! So, I do - he says again, take Metformin. I am. Still exhausted and fatigued. Tried to keep up my exercise through water walking until Dec., but just couldn't do it any more by mid Dec. Now it is mid Feb., I'm still exhausted and fatigued, on diabetes diet, taking Metformin, bs averaging 135 and getting no where. Kidney numbers have improved. Neither Internist nor nephrologist want to see me for 3 to 6 months!Any clues??